fix compatibility with Sf5.0 Symfony\Component\HttpKernel\DataCollectorInterface (#18)

* fix compatibility with Symfony\Component\HttpKernel\DataCollector\DataCollectorInterface::collect

* Fix Composer deps and PHPStan

* Revert useless return type removal

Author: XuruDragon

composer.json

@@ -17,9 +17,9 @@
     ],
     "require": {
         "php": "^7.1.3",
-        "symfony/config": "^3.4|^4.3|^5.0",
-        "symfony/dependency-injection": "^3.4|^4.3|^5.0",
-        "symfony/http-kernel": "^3.4|^4.3|^5.0",
+        "symfony/config": "^4.3.7|^5.0",
+        "symfony/dependency-injection": "^4.3.7|^5.0",
+        "symfony/http-kernel": "^4.3.7|^5.0",
         "symfony/mercure": "^0.3"
     },
     "autoload": {
@@ -37,9 +37,9 @@
         "sort-packages": true
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^4.2.4|^5.0",
-        "symfony/stopwatch": "^3.4|^4.3|^5.0",
-        "symfony/var-dumper": "^3.4|^4.3|^5.0"
+        "symfony/phpunit-bridge": "^4.3.7|^5.0",
+        "symfony/stopwatch": "^4.3.7|^5.0",
+        "symfony/var-dumper": "^4.3.7|^5.0"
     },
     "suggest": {
         "symfony/messenger": "To use the Messenger integration"

phpstan.neon

@@ -1,6 +1,6 @@
 parameters:
 	autoload_files:
-		- vendor/bin/.phpunit/phpunit-7.4/vendor/autoload.php
+		- vendor/bin/.phpunit/phpunit-8.3-0/vendor/autoload.php
 	ignoreErrors:
 		# Intended
-		- '#Call to an undefined method Symfony\\Component\\Config\\Definition\\Builder\\NodeDefinition::.*\.#'
+		- '#Call to an undefined method Symfony\\Component\\Config\\Definition\\Builder\\TreeBuilder::root\(\)\.#'

src/DataCollector/MercureDataCollector.php

@@ -30,7 +30,7 @@ public function __construct(iterable $publishers)
         $this->publishers = $publishers;
     }
 
-    public function collect(Request $request, Response $response, \Exception $exception = null): void
+    public function collect(Request $request, Response $response, \Throwable $exception = null): void
     {
         $this->data = [
             'count' => 0,